A.3.5MPa B.4MPa C.1MPa D.6.5MPa
A.鉆進(jìn) B.起下鉆 C.倒扣
A.轉(zhuǎn)盤、水龍頭 B.轉(zhuǎn)盤、水龍頭、大鉤 C.轉(zhuǎn)盤、泵、水龍頭